You will get two ways to fix the drive is not a valid backup location in Windows 10/8/8.1/7 problem. There are some better solutions for USB flash drive not a valid backup location for system image. Fix Create a System Image not Working for USB Drive Problem So making a system backup to USB flash drive is not a recommended option for Windows 7/8/10 users. Moreover, the USB flash drive could be easily lost or access by other people. Since the size of USB drive is quite small so that the space filled up quickly. The reason why you got this message is Windows 7 Backup and Restore, File recovery in Windows 8, both don’t allow using USB Flash drive as destination, and Windows 10 works the same way. Then, format the USB flash drive to NTFS, but the computer displayed the information 'The drive is not a valid backup location' so that you still cannot backup system to the USB drive. To create a system image to a USB drive, it must be formatted to use the NTFS file system. You were told that you could not backup system because the drive not formatted as NTFS when you first try. However, it must be frustrating when you create a system image not working for USB drive in Windows 10/8/7. Usually, Windows Operating System users would like to create a system image to USB flash drive, which can restore OS to a normal state from the system image file when Windows OS corrupted.
Can’t Create a System Image to USB Flash Drive